Which level requires no formal assessment if the candidate has trained in an approved organization?

The answer points to the Expert Level as the correct choice because this level allows for candidates who have completed training in an approved organization to bypass formal assessments. In aviation and related fields, the Expert Level is often associated with in-depth knowledge and advanced understanding of practices. Recognizing the expertise gained through training at reputable institutions, the regulatory framework may exempt individuals from further formal assessments, allowing them to demonstrate their competencies directly through their training and experience.

In contrast, other levels typically require some form of formal assessment to ensure competency. The Pre-operational Level might require candidates to demonstrate basic understanding or foundational skills through testing, while the Operational Level generally necessitates proving operational proficiency. The Extended Level could also include assessments that validate additional knowledge beyond the initial competencies required for operation. Thus, the structure surrounding assessments at these levels contrasts with the leeway afforded at the Expert Level.